Capturing water from air using solar PV-powered DC Compressor
Date Issued
2009
Date
2009
Author(s)
Lin, Yu-Ping
Abstract
This research is to develop water-capturing technique. Through system identification of water-capturing device, the condensed surface temperature of evaporator and the windspeed of the evaporator fan can be controlled to make the optimum water-capturing efficiency. First, the water-capturing device mechanisms and heat-pump system are designed for optimum operation. Second, by system identification, the system dynamic model can be obtained to design control parameters. From simulation results, the control can work well during the Ta=25℃~35℃, RH=40%~80%, wind speed of evaporator fan=1.0m/s~3.0m/s. And the error is less than 0.5℃ in 3 minutes.Third, within the Ta=25℃~35℃, RH=40%~80%, the system can reach the high water-capturing efficiency, power-saving and high COP when it operate at wind speed of evaporator fan 2.0m/s and the dTset=4℃.Finally, the outdoor experiments of the combination of PV power system and water-capturing system is done to verify its feasibility. From the experiment results, the whole system including PV power system and water-capturing system can work well day and night. And the whole system has the best performance when it works at night.
Subjects
PV power system
Heat Pump system
windspeed of evaporator fan
Condensed temperature of evaporator
Type
thesis
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